Flashing



May 19, 1936. Y 1.. FRIEDBERG FLASHING Filed March 25, 1935 L80 ,l'r'iedkerq Patented May 19, 1936 UNITED STATES PATENT OFFICE 7 Claims.

My invention relates to flashing, of the through wall type, which is preferably constructed of sheet metal ribbed transversely of its length to strenghen and hold. the sheet in the direction it must occupy in a wall to effectively drain off water to the outer surface of the wall, the ribs also serving, when imbedded in the mortar between the courses of masonry, to interlock with the mortar, when set, and providing a mechanical bond between the contiguous courses of masonry.

The object of the present invention is to provide a flashing sheet of this character which may be economically produced, which will have greater transverse strength, and which will provide the required means for interlocking with the mortar and prevent movement of the sheet in any direction, with all, permitting the flashing to be readily bent to provide flanges or other shapes without crushing or flattening the strengthening and. holding ribs at the bends.

The above object is accomplished through the provision of a flashing sheet with primary and secondary ribs, the primary or strengthening and holding ribs being desirably of a height slightly less than the thickness of a mortar layer or joint and of a width approximately twice that of its height, and the secondary or mortar anchoring ribs being formed on one of the inclined sides, only, of a primary rib at a point substantially above the lower edge or base thereof to extend toward the adjacent unribbed, oppositely inclined portion of the sheet.

A flashing of this character having the required strength may be produced with a saving in the amount of material required for its construction and bent into desired shapes for installation within a wall, without producing sharp bends adjacent the lower edges or bases of the strengthening ribs, i. e., the water draining surfaces of the sheet.

I have achieved the foregoing objects and such other objects as may herein appear in the manner illustrated in the accompanying drawing, in which:

Fig. 1 is a perspective View of a portion of a bending die or form constructed of interchangeable sections, illustrating the manner in which these sections are arranged to receive and bend the corrugated sheet of the instant invention to produce the shapes desired, without crushing or weakening the sheet material at the bends;

Fig. 2 is a sectional view of the die or form shown in Fig. 1 and showing the operation of a die roller over the bending form in producing the arcuate or curved bends in the ribbed flashing extend externally of one inclined wall or face of 10- the oppositely inclined walls of the strengthening ribs, instead of internally, as shown in Fig. 3; the mortar anchoring means on alternate strengthening ribs being in the form of aligned longitudinally spaced protuberances;

Figs. 5, 6, 7, and 8 show, more or less diagrammatically, different forms in which the compound ribbing may be made in accordance with the instant invention, without producing reverse bends adjacent the base or water draining surfaces of 20 the sheets.

In the drawing I have illustrated in Figs. 1 and 2 portions of a bending or shaping device which may be successfully used with the instant invention in which A represents a right angular bed 25 or die form, preferably composed of a plurality of interchangeable sections which may be connected together by bolts B, over which form a roller die C, also composed of interchangeable sections, may be operated to bend a section of 30 flashing 5, as indicated in dotted lines in Fig. 2. The bending machine herein illustrated and briefly described above forms no part of the instant invention and is merely shown in connection therewith to illustrate the manner in which the 35 novel forms of compound ribs may be bent transversely of their length, without flattening or crushing the primary or strengthening ribs, or otherwise weakening the sheet adjacent its water draining surfaces.

In Figs. 3 and 4 the flashing sheet is shown uniformly corrugated to provide transversely extending strengthening ribs 5 and 5. Oppositely inclined walls of the strengthening ribs shown in these figures meet at their bases to provide in- 45 termediate valleys 6 and 6' corresponding in shape and size to the ribs. Each of the ribs 5 and 5 are preferably of such height and width as will permit the formation of a relatively shallow rib 7 or 1 on one of its oppositely inclined walls so as to extendtoward an adjacent oppositely inclined unribbed wall portion of the sheet. In Fig. 3 the shallow mortar anchoring ribs I are shown turned inwardly towards the oppositely 55 inclined wall of a rib, whereas in Fig. 4 the mortar anchoring ribs 1' and segmental ribs 8 are shown turned outwardly towards the oppositely inclined wall of an adjacent rib 5. As illustrated in Fig. 4 the shallow mortar anchoring means may take the form of a continuous rib l disposed on one inclined wall approximately midway between the upper and lower edges of the rib or may comprise a plurality of aligned protuberances 8 of desired cross section, or a combination of the two.

The forms shown in Figs. 5 to 8, inclusive, each make use of the compound ribbing, more fully described in connection with Figs. 3 and 4, and differ from those in Figs. 3 and 4 mainly in the spaced arrangement of the primary or holding ribs designated respectively in Figs. 5 to 8 as 9, 10, 11, and 12, providing intervening plain or flat sections 13, I4, l5 and I6, respectively. As in Figs. 3 and 4, a wall of each primary rib is formed intermediate its height with a secondary or mortar anchoring rib designated respectively in these figures as ll, [8, I9, and 20. By arranging alternate transversely extending strengthening ribs so as to extend to opposite sides of the intervening plain or flat sections, a saving in material may be efiected without weakening the sheet, the ribs serving also in use to centrally space and support the main body of the flashing within a mortar layer. In each case, however, it is important to note that the secondary or mortar anchoring ribs are spaced a material distance from the bases of the primary strengthening ribs and preferably adjacent the center of an inclined wall of said ribs, and that the mortar anchoring ribs are of a depth slightly less than half the width of a primary or strengthening rib at that point, as indicated by the vertical lines :r-r passing through the apexes of the primary ribs in each of Figs. 5, 6, and '7.

By reference to Figs. 2 ant 5 it will be noted that the primary ribs may thus be supported transversely and throughout the length and height of 'at least one inclined wall upon the ribs of a bending die or block, such as is designated as A in Figs. 1 and 2 and indicated by dotted lines at A at the right of Fig. 5.

In use, the primary ribs function when imbeded in a mortar layer to prevent longitudinal movement of a flashing section; the secondary ribs, which are carried upon a wall of the primary ribs, prevent vertical movement of the flashing sections, and the primary and secondary ribs cooperate in the arrangements shown to prevent transverse movement of the section. The flashing sections constructed in accordance with the present invention are thus anchored in every direction in a mortar layer and possess greater transverse strength through the compound ribbing, preventing sagging of intermediate portions of the sheet. 7

Other forms than those herein shown and described may be employed, embodying the features of my invention, to meet special arrangements, without departing from the spirit of my invention.

I claim:

1. A through wall flashing comprising a sheet of metal having transversely extending strengthening ribs each having oppositely inclined walls extending substantially normal to each other, one of the inclined walls of certain of said ribs having a reversely bent portion intermediate its height to provide a mortar receiving and bonding key.

2. A through wall flashing comprising a sheet of metal having transversely extending strengthening ribs each having oppositely inclined walls extending substantially normal to each other, one of the walls of certain of said ribs having a portion extending inwardly toward the other wall of said rib at a point above the base of said rib, whereby to provide with said walls a mortar receiving and bonding key.

3. A through wall flashing comprising a sheet of metal having transversely extending strengthening ribs each having oppositely inclined walls extending substantially normal to each other, one of the walls of certain of said ribs having intermediate its height a transversely extending rib which projects from one side thereof toward the oppositely inclined wall.

4. A through wall flashing comprising a sheet of metal having a series of vertical strengthening ribs extending transversely of the sheet providing valleys therebetween, the walls defining said ribs being oppositely inclined to a vertical plane passing through the intersection of said walls, a wall of certain of said ribs having intermediate its height a horizontal mortar bonding rib which extends partially over the adjacent valley.

5. A through wall flashing comprising a sheet of metal formed at intervals with transversely extending strengthening ribs which extend alternately to opposite sides of said sheet, a wall of certain of said ribs having intermediate its height a mortar anchoring rib which extends toward the opposite wall of the rib to provide a combined strengthening and mortar bonding means for said sheet.

6. A through wall flashing comprising a sheet of metal having transversely extending strengthening ribs which are laterally spaced by unribbed portions of the materially greater length in the longitudinal direction of the sheet than the width of said ribs at their bases adjoining said portions, the walls of said ribs extending at angles to said unribbed portions, and a wall of each rib having a horizontal mortar bonding rib extending toward the other wall of said strengthening rib.

'7. A through wall flashing comprising a sheet of metal having transversely extending ribs and unribbed portions connecting the bases of said ribs, the width of said ribs at their bases being relatively small as compared with the longitudinal length of said unribbed portions, and a wall of each rib being bent intermediate the height of said rib out of the plane of said wall to provide mortar bonding keys in spaced relation to the unribbed portions of the sheet.

LEO FRIEDBERG. 

